Idea for banning toxic players

Why instead of permabanning people's account for toxicity, they just permaban their ability to communicate in-game? both allies and in all. I know this happens in the beginning, where they block you from chatting, and it works! no more toxicity from that person.

I don't think it's appropriate because some people get permabanned for their words, not their play. Some people have anger issues, I don't know. If that's the case, then revoking their ability to chat would fix that, wouldn't it?

I think it'd be appropriate to permaban people that intentionally feed, afk and troll. Those shouldn't be allowed to play again.

This is my third account, recently started after a year of absence, I've seen it all. Just a thought that'll hopefully get enough traction to get noticed.